From the post "What Does It Mean to Be Excited",
\(E_{\Delta h}=mc^2(\cfrac{a_{\psi\,f}}{a_{\psi\,i}}-1)\)
and from the previous post "Charge Photons Creation",
\(iT=\cfrac{2\pi a_{\psi\,n}}{c}=t_g\)
\(\cfrac{a_{\psi\,f}}{a_{\psi\,i}}=\cfrac{t_{gf}}{t_{gi}}\)
We have,
\(E_{\Delta h}=mc^2(\cfrac{t_{gf}}{t_{gi}}-1)\)
\(t_{gf}=t_{gi}(\cfrac{E_{\Delta h}}{mc^2}+1)\)
But what is \(t_{gf}\) and \(t_{gi}\)? However,
\(\cfrac{\partial\,t_{gf}}{\partial\,t}=\cfrac{1}{mc^2}(\cfrac{\partial\,t_{gi}}{\partial\,t}E_{\Delta h}+t_{gi}\cfrac{\partial\,E_{\Delta h}}{\partial\,t})+\cfrac{\partial\,t_{gi}}{\partial\,t}\)
This suggests that the passage of time can be affected by an absolute change in energy, \(E_{\Delta h}\) or an high rate of change in \(E_{\Delta h}\), \(\cfrac{\partial\,E_{\Delta h}}{\partial\,t}\). In both cases, we are restrained by \(mc^2\).
\(\Delta_t=\cfrac{\partial\,t_{gf}}{\partial\,t}-\cfrac{\partial\,t_{gi}}{\partial\,t}=\cfrac{1}{mc^2}(\cfrac{\partial\,t_{gi}}{\partial\,t}E_{\Delta h}+t_{gi}\cfrac{\partial\,E_{\Delta h}}{\partial\,t})\)
It is possible to increase or decrease time flow by changing the sign of \(\cfrac{\partial\,E_{\Delta h}}{\partial\,t}\). When \(\Delta_t\gt0\), the rest of the world flows backward and we travel forward in time; when \(\Delta_t\lt0\), the rest of the world flows forward and we travel back in time.
Changing \(\cfrac{\partial\,E_{\Delta h}}{\partial\,t}\) is the same as manipulating \(\psi\) as discussed in the post "Time Travel By Manipulating ψ". The relationship presented here is much more clear.